<template>
  <div>
     <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>
    <el-card>
       <el-alert center show-icon :closable="false"
    title="添加商品信息"
    type="info">
  </el-alert>
<el-steps :space="200" :active="activeIndex - ''" finish-status="success" align-center>
  <el-step title="基本信息"></el-step>
  <el-step title="商品参数"></el-step>
  <el-step title="商品属性"></el-step>
  <el-step title="商品图片"></el-step>
  <el-step title="商品内容"></el-step>
  <el-step title="完成"></el-step>
</el-steps>
<!-- tags区域 -->
<el-form :model="addForm" :rules="AddRules"
ref="addFormRef" label-width="100px" label-position="top">
  <el-tabs :tab-position="'left'" @tab-click="tabClicked" v-model="activeIndex" :before-leave="beforeTagLeave">
    <el-tab-pane label="基本信息" name="0">
    <el-form-item label="商品名称" prop="goods_name">
    <el-input v-model="addForm.goods_name"></el-input>
    </el-form-item>
    <el-form-item label="商品价格" prop="goods_price">
    <el-input v-model="addForm.goods_price" type="number"></el-input>
    </el-form-item>
    <el-form-item label="商品重量" prop="goods_weight">
    <el-input v-model="addForm.goods_weight" type="number"></el-input>
    </el-form-item>
    <el-form-item label="商品数量" prop="goods_number">
    <el-input v-model="addForm.goods_number" type="number"></el-input>
    </el-form-item>
    <el-form-item label="商品分类" prop="goods_cat">
    <el-cascader :options="catelist" :props="cateProps" v-model="addForm.goods_cat" @change="handleChange">
    </el-cascader>
    </el-form-item>
    </el-tab-pane>
    <el-tab-pane label="商品参数" name="1">商品参数</el-tab-pane>
    <el-tab-pane label="商品属性" name="2">商品管理</el-tab-pane>
    <el-tab-pane label="商品图片" name="3">商品图片</el-tab-pane>
    <el-tab-pane label="商品内容" name="4">商品内容</el-tab-pane>
  </el-tabs>
</el-form>
    </el-card>
  </div>
</template>
<script>
export default {
  data () {
    return {
      activeIndex: '0',
      addForm: {
        goods_name: '',
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        // 商品分类数据
        goods_cat: []
      },
      AddRules: {
        goods_name: [
          { required: true, message: '请输入商品名称', trigger: 'blur' }
        ],
        goods_price: [
          { required: true, message: '请输入商品价格', trigger: 'blur' }
        ],
        goods_weight: [
          { required: true, message: '请输入商品重量', trigger: 'blur' }
        ],
        goods_number: [
          { required: true, message: '请输入商品数量', trigger: 'blur' }
        ],
        goods_cat: [
          { required: true, message: '请输入商品分类', trigger: 'blur' }
        ]
      },
      catelist: [],
      cateProps: {
        value: 'cat_id',
        label: 'cat_name',
        children: {
          value: 'cat_id',
          label: 'cat_name',
          expandTrigger: 'hover'
        },
        expandTrigger: 'hover'
      },
      manyTableData: []
    }
  },
  created () {
    this.getCateList()
  },
  methods: {
    // 获取所有商品分类数据
    async getCateList () {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) return this.$message.error('获取商品分类数据失败')
      this.catelist = res.data
      console.log(this.catelist)
    },
    handleChange () {
      console.log(this.addForm.goods_cat)
      if (this.addForm.goods_cat.length !== 1) {
        this.addForm.goods_cat = []
      }
    },
    beforeTagLeave (activeName, oldActiveName) {
      // console.log('即将离开的标签页名字' + oldActiveName)
      // console.log('即将到达的标签页名字' + activeName)
      if (oldActiveName === '0' && this.addForm.goods_cat.length !== 1) {
        this.$message.error('请先选择商品')
        return false
      }
    },
    async tabClicked () {
      // console.log(this.activeIndex)
      if (this.activeIndex === 1) {
        const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, {
          params: { sel: 'many' }
        })
        if (res.meta.status !== 200) return this.$message.error('获取动态参数列表失败')
        console.log(res.data)
        this.manyTableData = res.data
      }
    }
  },
  computed: {
    cateId () {
      if (this.addForm.goods_cat.length === 1) {
        return this.addForm.goods_cat[0]
      }
      return null
    }
  }
}
</script>
<style lang="less" scoped>
.el-steps {
  margin-top: 15px
 }
 .el-step__title {
    font-size: 13px
 }
</style>
